Sara Levine is an author, educator, and veterinarian. Her science books for children include the Animal by Animal series, Germs Up Close, and A Peek at Beaks: Tools Birds Use. Her books have received a number of awards including AAAS/Subaru SB&F Prize, Utah Beehive Book Award, Cook Prize finalist, Monarch Award master list, and Bank Street College Best Children's Book of the Year.

T.S Spookytooth has been illustrating for many years. Throughout these years of brandishing a paintbrush, he has explored the diverse fields of children's picture books; magazine and newspaper illustrations; and advertising, packaging, and illustrating for websites.

When not working on illustration commissions, he likes to find time to work on many of his own personal projects. He keeps these projects locked in a suitcase but sometimes he forgets where he left the key. An ideal day for Mr. Spookytooth is to ponder and then to draw these ponderings. Some food is fitted in along the way followed by more ponderings and the occasional readjustment of his bow tie, but ponderings are the main order of the day.

He also lives in a house with Mrs. Spookytooth and thankfully she is fond of a ponder as well . . . and is good at finding lost keys.